First off I am a teenager so I know my period can be irregular, but these past few months my period has started at the 1st of each month. Yesterday morning after peeing I wiped and there was hint of red so I thought I started my period. I put in a tampon at 7am and went about my day. At 11am I went to change my tampon and there was barely any red on it, maybe just a hint of watery red on the tip. I then kept it in until 4pm that day and changed it and the same thing occurred. Last night I put a pad on and went to bed, but this morning there was absolutely no blood on the pad. I am so confused because I thought for sure I started my period but it seems like I haven't. There is no sight of blood at all. The last time my boyfriend and I had sex was Saturday May 5th which was about the time I shouldve started my period. We have no once had sex without a condom. I let him put it in for a few minutes and then put the condom on so we can continue having sex. Could the pre-ejaculation have got me pregnant? Did the hard sex delay my period even more? Should I be worried about my health or is this just a light period?